CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Post-Processing

A strange Problem with my OpenFoam animation

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   August 4, 2015, 20:52
Default A strange Problem with my OpenFoam animation
  #1
Member
 
Mohammad Saeedi
Join Date: Apr 2011
Location: Canada
Posts: 82
Rep Power: 7
saeedi is on a distinguished road
Hi there,

I am new to OpenFoam and just started working with that.

I have conducted a test on a 2D cylinder at Re=100 (laminar), just to make sure that the basics of my openfoam simulation are OK.

The simulation went well and I also made an animation for the flow evolution which can be downloaded from here:

https://www.dropbox.com/s/zqnvxg7hbt...-SLOW.avi?dl=0

and here is with the vectors superimposed:

https://www.dropbox.com/s/e3mvvvxnm0...ector.avi?dl=0


There is some thing that puzzles me a bit. Although it is quite obvious from the contour structures and topology that the flow is from left to right, in the animation it seems that those high U contours are begin convected from the outflow boundary to the cylinder. It is not a visual mistake as I refined the time step and got the same result.

I suspect there might be some more subtleties related to OpenFoam. I checked whatever I knew but could not find the problem. If I ran the animation in the reverse order then it looks quite nice!

if you look at the flow development, from time=0 to the first couple of snapshots, it shows that the flow is developing correctly and I think that is an indication that the zone order is right. But suddenly we see that reverse behavior around time=1.


I'd appreciate your help.
saeedi is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Extrusion with OpenFoam problem No. Iterations 0 Lord Kelvin OpenFOAM Running, Solving & CFD 8 March 28, 2016 11:08
strange problem with data seav OpenFOAM Running, Solving & CFD 0 April 11, 2014 05:01
Problem in fvMesh.C when using topological changes. OpenFoam 2-2-x Horacio Aguerre OpenFOAM Programming & Development 0 August 14, 2013 11:57
OpenFOAM 1.7.1 installation problem on Fedora 14 armonica OpenFOAM Installation 16 March 31, 2011 13:16
Anyone met this strange problem? Lee CD-adapco 1 June 7, 2005 03:15


All times are GMT -4. The time now is 20:31.